Acute painful anal lesions.
D000328:Adult; D001004:Anus Diseases / Q000175:diagnosis*; D001005:Anus Neoplasms / Q000175:diagnosis; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis; D003937:Diagnosis, Differential; D005401:Fissure in Ano / Q000175:diagnosis; D006484:Hemorrhoids / Q000175:diagnosis; D006801:Humans; D010864:Pilonidal Sinus / Q000175:diagnosis; D013587:Syphilis / Q000175:diagnosis